Going to a Mopar Gold Mine...
The nice thing about a 318 challenger vert is it's a vert. The other thing, is because it's a 318, it doesnt have a pedigree that a 340, 383, 440, ot 426 car has. Kinda like the 67 and 69 cudas I have. This makes it a blank slate. Buy a brochure for that year challenger, Get the wifey involved. Build it off the brochure with colors, options etc as if you went to a dealer back then and coulda ordered one. Tell her this would be cool to build it with whatever options were available. Let her look through the brochure and pick out stuff she would like on it. If you do this, you may not need to buy her a room full of roses.
Plus when you put it together, theres lots you can do to tighten it up and make it feel more solid. Spray foam on the backs of the plastic door panels, thin strips of felt glued between plastic and steel so it doesnt creak or squeak. My 70 was a chicks car, and was pretty ragged out when I got it. I have no earthly idea why anybody woulda ordered it with a slant sux.
I know back then in 1970 there were 2 challenger vert press cars running around the auto show circuit. Both were panther pink, and had a pinkish stripe, white tops and white interiors. I think they were both 440+6 4 speed shaker hood cars. Really good looking and very rare color combo. Back then there were some really cool optioned cars. You 2 could have lots of fun picking out your "brand new" 1970 challenger. I think Mark Worman at GYC does this sort of thing with customers as well.